157399290 has 24 divisors (see below), whose sum is σ = 409238388. Its totient is φ = 41973120.

The previous prime is 157399283. The next prime is 157399301. The reversal of 157399290 is 92993751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 142491969 + 14907321 = 11937^2 + 3861^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 874351 + ... + 874530.

Almost surely, 2^157399290 is an apocalyptic number.

157399290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157399290 is an abundant number, since it is smaller than the sum of its proper divisors (251839098).

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

157399290 is a wasteful number, since it uses less digits than its factorization.

157399290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748894 (or 1748891 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 157399290 is about 12545.8873739565. The cubic root of 157399290 is about 539.9260186714.

The spelling of 157399290 in words is "one hundred fifty-seven million, three hundred ninety-nine thousand, two hundred ninety".