157783440 has 40 divisors (see below), whose sum is σ = 489129408. Its totient is φ = 42075520.

The previous prime is 157783433. The next prime is 157783453. The reversal of 157783440 is 44387751.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×157783440² = 49791227876467200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328476 + ... + 328955.

Almost surely, 2^157783440 is an apocalyptic number.

157783440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157783440 is an abundant number, since it is smaller than the sum of its proper divisors (331345968).

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

157783440 is a wasteful number, since it uses less digits than its factorization.

157783440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657447 (or 657441 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 157783440 is about 12561.1878419200. The cubic root of 157783440 is about 540.3649111020.

The spelling of 157783440 in words is "one hundred fifty-seven million, seven hundred eighty-three thousand, four hundred forty".