39401028 has 18 divisors (see below), whose sum is σ = 99597134. Its totient is φ = 13133664.

The previous prime is 39401027. The next prime is 39401051. The reversal of 39401028 is 82010493.

It can be written as a sum of positive squares in only one way, i.e., 31002624 + 8398404 = 5568^2 + 2898^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 39400992 and 39401010.

It is not an unprimeable number, because it can be changed into a prime (39401023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 547201 + ... + 547272.

Almost surely, 2^39401028 is an apocalyptic number.

It is an amenable number.

39401028 is an abundant number, since it is smaller than the sum of its proper divisors (60196106).

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

39401028 is a wasteful number, since it uses less digits than its factorization.

39401028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094483 (or 1094478 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 39401028 is about 6277.0238170649. The cubic root of 39401028 is about 340.2795509413.

The spelling of 39401028 in words is "thirty-nine million, four hundred one thousand, twenty-eight".