37994640 has 160 divisors (see below), whose sum is σ = 125349120. Its totient is φ = 9504768.

The previous prime is 37994639. The next prime is 37994651. The reversal of 37994640 is 4649973.

It is a junction number, because it is equal to n+sod(n) for n = 37994592 and 37994601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 368829 + ... + 368931.

It is an arithmetic number, because the mean of its divisors is an integer number (783432).

Almost surely, 2^37994640 is an apocalyptic number.

37994640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37994640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62674560).

37994640 is an abundant number, since it is smaller than the sum of its proper divisors (87354480).

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

37994640 is a wasteful number, since it uses less digits than its factorization.

37994640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 37994640 is about 6163.9792342285. The cubic root of 37994640 is about 336.1817327540.

The spelling of 37994640 in words is "thirty-seven million, nine hundred ninety-four thousand, six hundred forty".