87249642 has 32 divisors (see below), whose sum is σ = 178321920. Its totient is φ = 28451520.

The previous prime is 87249641. The next prime is 87249647. The reversal of 87249642 is 24694278.

It is a super-2 number, since 2×87249642² = 15225000058256328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87249594 and 87249603.

It is not an unprimeable number, because it can be changed into a prime (87249641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81084 + ... + 82152.

It is an arithmetic number, because the mean of its divisors is an integer number (5572560).

Almost surely, 2^87249642 is an apocalyptic number.

87249642 is an abundant number, since it is smaller than the sum of its proper divisors (91072278).

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

87249642 is a wasteful number, since it uses less digits than its factorization.

87249642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358.

The product of its digits is 193536, while the sum is 42.

The square root of 87249642 is about 9340.7516828144. The cubic root of 87249642 is about 443.5281795011.

The spelling of 87249642 in words is "eighty-seven million, two hundred forty-nine thousand, six hundred forty-two".