157785378 has 16 divisors (see below), whose sum is σ = 317068896. Its totient is φ = 52345440.

The previous prime is 157785349. The next prime is 157785389. The reversal of 157785378 is 873587751.

157785378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 157785378.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61051 + ... + 63582.

It is an arithmetic number, because the mean of its divisors is an integer number (19816806).

Almost surely, 2^157785378 is an apocalyptic number.

157785378 is an abundant number, since it is smaller than the sum of its proper divisors (159283518).

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

157785378 is a wasteful number, since it uses less digits than its factorization.

157785378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124849.

The product of its digits is 1646400, while the sum is 51.

The square root of 157785378 is about 12561.2649840691. The cubic root of 157785378 is about 540.3671234654.

The spelling of 157785378 in words is "one hundred fifty-seven million, seven hundred eighty-five thousand, three hundred seventy-eight".