64831020 has 96 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 16346880.

The previous prime is 64831007. The next prime is 64831027. The reversal of 64831020 is 2013846.

It is a happy number.

It is a super-2 number, since 2×64831020² = 8406122308480800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64831027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150205 + ... + 150635.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^64831020 is an apocalyptic number.

64831020 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 64831020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95800320).

64831020 is an abundant number, since it is smaller than the sum of its proper divisors (126769620).

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

64831020 is a wasteful number, since it uses less digits than its factorization.

64831020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 64831020 is about 8051.7712337100. The cubic root of 64831020 is about 401.7238518315.

Adding to 64831020 its reverse (2013846), we get a palindrome (66844866).

It can be divided in two parts, 6483 and 1020, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 64831020 in words is "sixty-four million, eight hundred thirty-one thousand, twenty".