64890030 has 32 divisors (see below), whose sum is σ = 155952288. Its totient is φ = 17280000.

The previous prime is 64890019. The next prime is 64890079. The reversal of 64890030 is 3009846.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 64890030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35130 + ... + 36930.

It is an arithmetic number, because the mean of its divisors is an integer number (4873509).

Almost surely, 2^64890030 is an apocalyptic number.

64890030 is an abundant number, since it is smaller than the sum of its proper divisors (91062258).

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

64890030 is a wasteful number, since it uses less digits than its factorization.

64890030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 64890030 is about 8055.4348113556. The cubic root of 64890030 is about 401.8456995505.

Adding to 64890030 its reverse (3009846), we get a palindrome (67899876).

The spelling of 64890030 in words is "sixty-four million, eight hundred ninety thousand, thirty".