49423440 has 160 divisors (see below), whose sum is σ = 169739136. Its totient is φ = 11796480.

The previous prime is 49423433. The next prime is 49423457. The reversal of 49423440 is 4432494.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 49423398 and 49423407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255984 + ... + 256176.

Almost surely, 2^49423440 is an apocalyptic number.

49423440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84869568).

49423440 is an abundant number, since it is smaller than the sum of its proper divisors (120315696).

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

49423440 is a wasteful number, since it uses less digits than its factorization.

49423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 49423440 is about 7030.1806520174. The cubic root of 49423440 is about 366.9816283646.

The spelling of 49423440 in words is "forty-nine million, four hundred twenty-three thousand, four hundred forty".