39401428 has 24 divisors (see below), whose sum is σ = 76134240. Its totient is φ = 17692320.

The previous prime is 39401423. The next prime is 39401431. The reversal of 39401428 is 82410493.

It is a self number, because there is not a number n which added to its sum of digits gives 39401428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39401423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1743 + ... + 9046.

It is an arithmetic number, because the mean of its divisors is an integer number (3172260).

Almost surely, 2^39401428 is an apocalyptic number.

It is an amenable number.

39401428 is a deficient number, since it is larger than the sum of its proper divisors (36732812).

39401428 is a wasteful number, since it uses less digits than its factorization.

39401428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10887 (or 10885 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 39401428 is about 6277.0556792178. The cubic root of 39401428 is about 340.2807024456.

The spelling of 39401428 in words is "thirty-nine million, four hundred one thousand, four hundred twenty-eight".