28031064 has 32 divisors (see below), whose sum is σ = 71403120. Its totient is φ = 9166976.

The previous prime is 28031057. The next prime is 28031071. The reversal of 28031064 is 46013082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28031057) and next prime (28031071).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9747 + ... + 12290.

Almost surely, 2^28031064 is an apocalyptic number.

28031064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28031064 is an abundant number, since it is smaller than the sum of its proper divisors (43372056).

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

28031064 is a wasteful number, since it uses less digits than its factorization.

28031064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22099 (or 22095 counting only the distinct ones).

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

The square root of 28031064 is about 5294.4370805592. The cubic root of 28031064 is about 303.7711516372.

The spelling of 28031064 in words is "twenty-eight million, thirty-one thousand, sixty-four".