157778472 has 32 divisors (see below), whose sum is σ = 400006080. Its totient is φ = 51851520.

The previous prime is 157778447. The next prime is 157778497. The reversal of 157778472 is 274877751.

It is an interprime number because it is at equal distance from previous prime (157778447) and next prime (157778497).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44593 + ... + 48000.

It is an arithmetic number, because the mean of its divisors is an integer number (12500190).

Almost surely, 2^157778472 is an apocalyptic number.

157778472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157778472 is an abundant number, since it is smaller than the sum of its proper divisors (242227608).

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

157778472 is a wasteful number, since it uses less digits than its factorization.

157778472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92673 (or 92669 counting only the distinct ones).

The product of its digits is 768320, while the sum is 48.

The square root of 157778472 is about 12560.9900883648. The cubic root of 157778472 is about 540.3592396977.

The spelling of 157778472 in words is "one hundred fifty-seven million, seven hundred seventy-eight thousand, four hundred seventy-two".