78364587 has 16 divisors (see below), whose sum is σ = 120598272. Its totient is φ = 44335200.

The previous prime is 78364579. The next prime is 78364609. The reversal of 78364587 is 78546387.

It is not a de Polignac number, because 78364587 - 2³ = 78364579 is a prime.

It is a super-2 number, since 2×78364587² = 12282016991361138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78364537) 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, 16353 + ... + 20594.

It is an arithmetic number, because the mean of its divisors is an integer number (7537392).

Almost surely, 2^78364587 is an apocalyptic number.

78364587 is a deficient number, since it is larger than the sum of its proper divisors (42233685).

78364587 is a wasteful number, since it uses less digits than its factorization.

78364587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37058.

The product of its digits is 1128960, while the sum is 48.

The square root of 78364587 is about 8852.3774772656. The cubic root of 78364587 is about 427.9305412512.

The spelling of 78364587 in words is "seventy-eight million, three hundred sixty-four thousand, five hundred eighty-seven".