39402129 has 16 divisors (see below), whose sum is σ = 56693952. Its totient is φ = 24197568.

The previous prime is 39402127. The next prime is 39402137. The reversal of 39402129 is 92120493.

It is not a de Polignac number, because 39402129 - 2¹ = 39402127 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39402096 and 39402105.

It is not an unprimeable number, because it can be changed into a prime (39402127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29494 + ... + 30800.

It is an arithmetic number, because the mean of its divisors is an integer number (3543372).

Almost surely, 2^39402129 is an apocalyptic number.

39402129 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

39402129 is a deficient number, since it is larger than the sum of its proper divisors (17291823).

39402129 is a wasteful number, since it uses less digits than its factorization.

39402129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 39402129 is about 6277.1115172506. Note that the first 3 decimals coincide. The cubic root of 39402129 is about 340.2827204381.

The spelling of 39402129 in words is "thirty-nine million, four hundred two thousand, one hundred twenty-nine".