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50979440 = 245637243
BaseRepresentation
bin1100001001111…
…0001001110000
310112221000122102
43002132021300
5101022320230
65020355532
71156214051
oct302361160
9115830572
1050979440
112685a676
12150a5ba8
13a73c165
146ab0728
154720045
hex309e270

50979440 has 20 divisors (see below), whose sum is σ = 118527384. Its totient is φ = 20391744.

The previous prime is 50979437. The next prime is 50979449. The reversal of 50979440 is 4497905.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 50979394 and 50979403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50979449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318542 + ... + 318701.

Almost surely, 250979440 is an apocalyptic number.

It is an amenable number.

50979440 is an abundant number, since it is smaller than the sum of its proper divisors (67547944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50979440 is a wasteful number, since it uses less digits than its factorization.

50979440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637256 (or 637250 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 50979440 is about 7139.9887955094. The cubic root of 50979440 is about 370.7931366886.

The spelling of 50979440 in words is "fifty million, nine hundred seventy-nine thousand, four hundred forty".

Divisors: 1 2 4 5 8 10 16 20 40 80 637243 1274486 2548972 3186215 5097944 6372430 10195888 12744860 25489720 50979440