42620644 has 24 divisors (see below), whose sum is σ = 81533088. Its totient is φ = 19333440.

The previous prime is 42620621. The next prime is 42620651. The reversal of 42620644 is 44602624.

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, 38304 + ... + 39400.

It is an arithmetic number, because the mean of its divisors is an integer number (3397212).

Almost surely, 2^42620644 is an apocalyptic number.

42620644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42620644 is a deficient number, since it is larger than the sum of its proper divisors (38912444).

42620644 is a wasteful number, since it uses less digits than its factorization.

42620644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995 (or 1993 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 42620644 is about 6528.4488203554. The cubic root of 42620644 is about 349.3065016232.

It can be divided in two parts, 42620 and 644, that added together give a square (43264 = 208²).

The spelling of 42620644 in words is "forty-two million, six hundred twenty thousand, six hundred forty-four".