64489830 has 16 divisors (see below), whose sum is σ = 154775664. Its totient is φ = 17197280.

The previous prime is 64489811. The next prime is 64489849. The reversal of 64489830 is 3898446.

It is an interprime number because it is at equal distance from previous prime (64489811) and next prime (64489849).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074801 + ... + 1074860.

It is an arithmetic number, because the mean of its divisors is an integer number (9673479).

Almost surely, 2^64489830 is an apocalyptic number.

64489830 is an abundant number, since it is smaller than the sum of its proper divisors (90285834).

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

64489830 is a wasteful number, since it uses less digits than its factorization.

64489830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149671.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 64489830 is about 8030.5560206003. The cubic root of 64489830 is about 401.0178867360.

The spelling of 64489830 in words is "sixty-four million, four hundred eighty-nine thousand, eight hundred thirty".