157778432 has 120 divisors (see below), whose sum is σ = 387185040. Its totient is φ = 63866880.

The previous prime is 157778429. The next prime is 157778441. The reversal of 157778432 is 234877751.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476507 + ... + 476837.

It is an arithmetic number, because the mean of its divisors is an integer number (3226542).

Almost surely, 2^157778432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157778432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193592520).

157778432 is an abundant number, since it is smaller than the sum of its proper divisors (229406608).

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

157778432 is an equidigital number, since it uses as much as digits as its factorization.

157778432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 359 counting only the distinct ones).

The product of its digits is 329280, while the sum is 44.

The square root of 157778432 is about 12560.9884961336. The cubic root of 157778432 is about 540.3591940337.

The spelling of 157778432 in words is "one hundred fifty-seven million, seven hundred seventy-eight thousand, four hundred thirty-two".