161294040 has 96 divisors (see below), whose sum is σ = 551818800. Its totient is φ = 40746240.

The previous prime is 161293997. The next prime is 161294057. The reversal of 161294040 is 40492161.

161294040 is a `hidden beast` number, since 1 + 612 + 9 + 4 + 0 + 40 = 666.

161294040 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 = 161293995 and 161294013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4951 + ... + 18630.

Almost surely, 2^161294040 is an apocalyptic number.

161294040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161294040 is an abundant number, since it is smaller than the sum of its proper divisors (390524760).

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

161294040 is a wasteful number, since it uses less digits than its factorization.

161294040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23617 (or 23610 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 161294040 is about 12700.1590541221. The cubic root of 161294040 is about 544.3431640318.

The spelling of 161294040 in words is "one hundred sixty-one million, two hundred ninety-four thousand, forty".