37640020 has 24 divisors (see below), whose sum is σ = 86230368. Its totient is φ = 13687200.

The previous prime is 37639981. The next prime is 37640021. The reversal of 37640020 is 2004673.

It is a super-2 number, since 2×37640020² = 2833542211200800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 37639973 and 37640000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37640021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85326 + ... + 85765.

It is an arithmetic number, because the mean of its divisors is an integer number (3592932).

Almost surely, 2^37640020 is an apocalyptic number.

It is an amenable number.

37640020 is an abundant number, since it is smaller than the sum of its proper divisors (48590348).

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

37640020 is a wasteful number, since it uses less digits than its factorization.

37640020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171111 (or 171109 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 37640020 is about 6135.1462900244. The cubic root of 37640020 is about 335.1325531729.

Adding to 37640020 its reverse (2004673), we get a palindrome (39644693).

The spelling of 37640020 in words is "thirty-seven million, six hundred forty thousand, twenty".