158451840 has 96 divisors (see below), whose sum is σ = 547173900. Its totient is φ = 42252288.

The previous prime is 158451833. The next prime is 158451841. The reversal of 158451840 is 48154851.

It can be written as a sum of positive squares in 2 ways, for example, as 139996224 + 18455616 = 11832^2 + 4296^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 158451795 and 158451804.

It is not an unprimeable number, because it can be changed into a prime (158451841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7995 + ... + 19514.

Almost surely, 2^158451840 is an apocalyptic number.

158451840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158451840 is an abundant number, since it is smaller than the sum of its proper divisors (388722060).

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

158451840 is a wasteful number, since it uses less digits than its factorization.

158451840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27534 (or 27519 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 158451840 is about 12587.7654887593. The cubic root of 158451840 is about 541.1268649442.

The spelling of 158451840 in words is "one hundred fifty-eight million, four hundred fifty-one thousand, eight hundred forty".