64011900 has 72 divisors (see below), whose sum is σ = 191209984. Its totient is φ = 16516800.

The previous prime is 64011889. The next prime is 64011923. The reversal of 64011900 is 911046.

It is a super-2 number, since 2×64011900² = 8195046683220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5859 + ... + 12741.

Almost surely, 2^64011900 is an apocalyptic number.

64011900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64011900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95604992).

64011900 is an abundant number, since it is smaller than the sum of its proper divisors (127198084).

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

64011900 is a wasteful number, since it uses less digits than its factorization.

64011900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931 (or 6924 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 64011900 is about 8000.7437154305. The cubic root of 64011900 is about 400.0247901303.

Adding to 64011900 its reverse (911046), we get a palindrome (64922946).

The spelling of 64011900 in words is "sixty-four million, eleven thousand, nine hundred".