156786428 has 12 divisors (see below), whose sum is σ = 280757400. Its totient is φ = 76570032.

The previous prime is 156786391. The next prime is 156786431. The reversal of 156786428 is 824687651.

156786428 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

156786428 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455603 + ... + 455946.

It is an arithmetic number, because the mean of its divisors is an integer number (23396450).

Almost surely, 2^156786428 is an apocalyptic number.

It is an amenable number.

156786428 is a deficient number, since it is larger than the sum of its proper divisors (123970972).

156786428 is a wasteful number, since it uses less digits than its factorization.

156786428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911596 (or 911594 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 156786428 is about 12521.4387352253. The cubic root of 156786428 is about 539.2243413347.

The spelling of 156786428 in words is "one hundred fifty-six million, seven hundred eighty-six thousand, four hundred twenty-eight".