37921642 has 24 divisors (see below), whose sum is σ = 62842500. Its totient is φ = 17149440.

The previous prime is 37921619. The next prime is 37921643. The reversal of 37921642 is 24612973.

It can be written as a sum of positive squares in 2 ways, for example, as 36735721 + 1185921 = 6061^2 + 1089^2 .

It is a junction number, because it is equal to n+sod(n) for n = 37921598 and 37921607.

It is not an unprimeable number, because it can be changed into a prime (37921643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84234 + ... + 84682.

Almost surely, 2^37921642 is an apocalyptic number.

37921642 is a deficient number, since it is larger than the sum of its proper divisors (24920858).

37921642 is a wasteful number, since it uses less digits than its factorization.

37921642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 811 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 37921642 is about 6158.0550500950. The cubic root of 37921642 is about 335.9662959862.

The spelling of 37921642 in words is "thirty-seven million, nine hundred twenty-one thousand, six hundred forty-two".