39378740 has 24 divisors (see below), whose sum is σ = 83228712. Its totient is φ = 15649920.

The previous prime is 39378721. The next prime is 39378793. The reversal of 39378740 is 4787393.

It can be written as a sum of positive squares in 4 ways, for example, as 6522916 + 32855824 = 2554^2 + 5732^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3131 + ... + 9410.

It is an arithmetic number, because the mean of its divisors is an integer number (3467863).

Almost surely, 2^39378740 is an apocalyptic number.

It is an amenable number.

39378740 is an abundant number, since it is smaller than the sum of its proper divisors (43849972).

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

39378740 is a wasteful number, since it uses less digits than its factorization.

39378740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12707 (or 12705 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 39378740 is about 6275.2482022626. The cubic root of 39378740 is about 340.2153768025.

The spelling of 39378740 in words is "thirty-nine million, three hundred seventy-eight thousand, seven hundred forty".