39240428 has 12 divisors (see below), whose sum is σ = 69835080. Its totient is φ = 19287552.

The previous prime is 39240427. The next prime is 39240449. The reversal of 39240428 is 82404293.

39240428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×39240428² = 3079622379246368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39240394 and 39240403.

It is not an unprimeable number, because it can be changed into a prime (39240427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 82901 + ... + 83372.

It is an arithmetic number, because the mean of its divisors is an integer number (5819590).

Almost surely, 2^39240428 is an apocalyptic number.

It is an amenable number.

39240428 is a deficient number, since it is larger than the sum of its proper divisors (30594652).

39240428 is a wasteful number, since it uses less digits than its factorization.

39240428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166336 (or 166334 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 39240428 is about 6264.2180677240. The cubic root of 39240428 is about 339.8165908145.

The spelling of 39240428 in words is "thirty-nine million, two hundred forty thousand, four hundred twenty-eight".