157881946 has 16 divisors (see below), whose sum is σ = 244811520. Its totient is φ = 76285440.

The previous prime is 157881943. The next prime is 157881947. The reversal of 157881946 is 649188751.

It is a self number, because there is not a number n which added to its sum of digits gives 157881946.

It is not an unprimeable number, because it can be changed into a prime (157881943) 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 7 ways as a sum of consecutive naturals, for example, 57370 + ... + 60058.

It is an arithmetic number, because the mean of its divisors is an integer number (15300720).

Almost surely, 2^157881946 is an apocalyptic number.

157881946 is a deficient number, since it is larger than the sum of its proper divisors (86929574).

157881946 is a wasteful number, since it uses less digits than its factorization.

157881946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669.

The product of its digits is 483840, while the sum is 49.

The square root of 157881946 is about 12565.1082764933. The cubic root of 157881946 is about 540.4773396994.

The spelling of 157881946 in words is "one hundred fifty-seven million, eight hundred eighty-one thousand, nine hundred forty-six".