157643442 has 64 divisors (see below), whose sum is σ = 391547520. Its totient is φ = 46598400.

The previous prime is 157643419. The next prime is 157643467. The reversal of 157643442 is 244346751.

157643442 is a `hidden beast` number, since 1 + 5 + 7 + 643 + 4 + 4 + 2 = 666.

157643442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 157643397 and 157643406.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21118 + ... + 27590.

It is an arithmetic number, because the mean of its divisors is an integer number (6117930).

Almost surely, 2^157643442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157643442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195773760).

157643442 is an abundant number, since it is smaller than the sum of its proper divisors (233904078).

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

157643442 is a wasteful number, since it uses less digits than its factorization.

157643442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536 (or 6530 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 157643442 is about 12555.6139634826. The cubic root of 157643442 is about 540.2050455882.

The spelling of 157643442 in words is "one hundred fifty-seven million, six hundred forty-three thousand, four hundred forty-two".