157389786 has 72 divisors (see below), whose sum is σ = 364011804. Its totient is φ = 49109760.

The previous prime is 157389773. The next prime is 157389797. The reversal of 157389786 is 687983751.

157389786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 128391561 + 28998225 = 11331^2 + 5385^2 .

Its product of digits (2540160) is a multiple of the sum of its prime factors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 559966 + ... + 560246.

Almost surely, 2^157389786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157389786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182005902).

157389786 is an abundant number, since it is smaller than the sum of its proper divisors (206622018).

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

157389786 is a wasteful number, since it uses less digits than its factorization.

157389786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 352 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 157389786 is about 12545.5085986978. The cubic root of 157389786 is about 539.9151512777.

The spelling of 157389786 in words is "one hundred fifty-seven million, three hundred eighty-nine thousand, seven hundred eighty-six".