464439987 has 30 divisors (see below), whose sum is σ = 762615084. Its totient is φ = 281472840.

The previous prime is 464439919. The next prime is 464440013. The reversal of 464439987 is 789934464.

It is a happy number.

It is not a de Polignac number, because 464439987 - 2²⁸ = 196004531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (464439487) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 13893 + ... + 33494.

Almost surely, 2^464439987 is an apocalyptic number.

464439987 is a deficient number, since it is larger than the sum of its proper divisors (298175097).

464439987 is a wasteful number, since it uses less digits than its factorization.

464439987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47421 (or 47401 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 464439987 is about 21550.8697504300. The cubic root of 464439987 is about 774.4199541819.

The spelling of 464439987 in words is "four hundred sixty-four million, four hundred thirty-nine thousand, nine hundred eighty-seven".