157690290 has 64 divisors (see below), whose sum is σ = 388115712. Its totient is φ = 40992000.

The previous prime is 157690279. The next prime is 157690297. The reversal of 157690290 is 92096751.

It is not an unprimeable number, because it can be changed into a prime (157690297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214764 + ... + 215496.

It is an arithmetic number, because the mean of its divisors is an integer number (6064308).

Almost surely, 2^157690290 is an apocalyptic number.

157690290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 157690290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194057856).

157690290 is an abundant number, since it is smaller than the sum of its proper divisors (230425422).

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

157690290 is a wasteful number, since it uses less digits than its factorization.

157690290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 157690290 is about 12557.4794445382. The cubic root of 157690290 is about 540.2585524540.

The spelling of 157690290 in words is "one hundred fifty-seven million, six hundred ninety thousand, two hundred ninety".