158651440 has 20 divisors (see below), whose sum is σ = 368864784. Its totient is φ = 63460544.

The previous prime is 158651407. The next prime is 158651491. The reversal of 158651440 is 44156851.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 158651396 and 158651405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991492 + ... + 991651.

Almost surely, 2^158651440 is an apocalyptic number.

158651440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158651440 is an abundant number, since it is smaller than the sum of its proper divisors (210213344).

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

158651440 is a wasteful number, since it uses less digits than its factorization.

158651440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983156 (or 1983150 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 158651440 is about 12595.6913267990. The cubic root of 158651440 is about 541.3539867444.

The spelling of 158651440 in words is "one hundred fifty-eight million, six hundred fifty-one thousand, four hundred forty".