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74390831 = 3710511913
BaseRepresentation
bin1000110111100…
…01110100101111
312011222110000222
410123301310233
5123021001311
611214241555
71562211614
oct433616457
9164873028
1074390831
1138a9aa29
1220ab62bb
1312548258
149c4650b
1567e6adb
hex46f1d2f

74390831 has 8 divisors (see below), whose sum is σ = 76514064. Its totient is φ = 72273600.

The previous prime is 74390807. The next prime is 74390857. The reversal of 74390831 is 13809347.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-74390831 is a prime.

It is a super-2 number, since 2×743908312 = 11067991473741122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74390791 and 74390800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74390881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37931 + ... + 39843.

It is an arithmetic number, because the mean of its divisors is an integer number (9564258).

Almost surely, 274390831 is an apocalyptic number.

74390831 is a deficient number, since it is larger than the sum of its proper divisors (2123233).

74390831 is a wasteful number, since it uses less digits than its factorization.

74390831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 74390831 is about 8625.0119420207. The cubic root of 74390831 is about 420.5714651024.

The spelling of 74390831 in words is "seventy-four million, three hundred ninety thousand, eight hundred thirty-one".

Divisors: 1 37 1051 1913 38887 70781 2010563 74390831