39429428 has 24 divisors (see below), whose sum is σ = 71051904. Its totient is φ = 19136000.

The previous prime is 39429421. The next prime is 39429431. The reversal of 39429428 is 82492493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39429421) 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, 23828 + ... + 25428.

It is an arithmetic number, because the mean of its divisors is an integer number (2960496).

Almost surely, 2^39429428 is an apocalyptic number.

It is an amenable number.

39429428 is a deficient number, since it is larger than the sum of its proper divisors (31622476).

39429428 is a wasteful number, since it uses less digits than its factorization.

39429428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783 (or 1781 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 39429428 is about 6279.2856281587. The cubic root of 39429428 is about 340.3612883880.

The spelling of 39429428 in words is "thirty-nine million, four hundred twenty-nine thousand, four hundred twenty-eight".