157228929 has 24 divisors (see below), whose sum is σ = 266814912. Its totient is φ = 87959520.

The previous prime is 157228927. The next prime is 157228957. The reversal of 157228929 is 929822751.

It is a happy number.

It is not a de Polignac number, because 157228929 - 2¹ = 157228927 is a prime.

It is a super-4 number, since 4×157228929⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (157228927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59797 + ... + 62370.

It is an arithmetic number, because the mean of its divisors is an integer number (11117288).

Almost surely, 2^157228929 is an apocalyptic number.

It is an amenable number.

157228929 is a deficient number, since it is larger than the sum of its proper divisors (109585983).

157228929 is a wasteful number, since it uses less digits than its factorization.

157228929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122197 (or 122194 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 157228929 is about 12539.0960200487. The cubic root of 157228929 is about 539.7311521802.

The spelling of 157228929 in words is "one hundred fifty-seven million, two hundred twenty-eight thousand, nine hundred twenty-nine".