157901730 has 32 divisors (see below), whose sum is σ = 433102464. Its totient is φ = 36091776.

The previous prime is 157901699. The next prime is 157901743. The reversal of 157901730 is 37109751.

157901730 = 2107² + 2108² + ... + 2141².

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 157901691 and 157901700.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 375747 + ... + 376166.

It is an arithmetic number, because the mean of its divisors is an integer number (13534452).

Almost surely, 2^157901730 is an apocalyptic number.

157901730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157901730 is an abundant number, since it is smaller than the sum of its proper divisors (275200734).

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

157901730 is a wasteful number, since it uses less digits than its factorization.

157901730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751930.

The product of its (nonzero) digits is 6615, while the sum is 33.

The square root of 157901730 is about 12565.8955112638. The cubic root of 157901730 is about 540.4999142820.

The spelling of 157901730 in words is "one hundred fifty-seven million, nine hundred one thousand, seven hundred thirty".