87624442 has 4 divisors (see below), whose sum is σ = 131436666. Its totient is φ = 43812220.

The previous prime is 87624431. The next prime is 87624451. The reversal of 87624442 is 24442678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 65918161 + 21706281 = 8119^2 + 4659^2 .

It is a super-2 number, since 2×87624442² = 15356085671622728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21906109 + ... + 21906112.

Almost surely, 2^87624442 is an apocalyptic number.

87624442 is a deficient number, since it is larger than the sum of its proper divisors (43812224).

87624442 is a wasteful number, since it uses less digits than its factorization.

87624442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43812223.

The product of its digits is 86016, while the sum is 37.

The square root of 87624442 is about 9360.7928083042. The cubic root of 87624442 is about 444.1623631770.

The spelling of 87624442 in words is "eighty-seven million, six hundred twenty-four thousand, four hundred forty-two".