42939400 has 48 divisors (see below), whose sum is σ = 114099840. Its totient is φ = 14721600.

The previous prime is 42939389. The next prime is 42939409. The reversal of 42939400 is 493924.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42939409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13936 + ... + 16735.

It is an arithmetic number, because the mean of its divisors is an integer number (2377080).

Almost surely, 2^42939400 is an apocalyptic number.

42939400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42939400 is an abundant number, since it is smaller than the sum of its proper divisors (71160440).

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

42939400 is a wasteful number, since it uses less digits than its factorization.

42939400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30694 (or 30685 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42939400 is about 6552.8161884796. The cubic root of 42939400 is about 350.1751504301.

The spelling of 42939400 in words is "forty-two million, nine hundred thirty-nine thousand, four hundred".