37994405 has 16 divisors (see below), whose sum is σ = 48541680. Its totient is φ = 28449792.

The previous prime is 37994393. The next prime is 37994417. The reversal of 37994405 is 50449973.

It is an interprime number because it is at equal distance from previous prime (37994393) and next prime (37994417).

It can be written as a sum of positive squares in 8 ways, for example, as 454276 + 37540129 = 674^2 + 6127^2 .

It is a cyclic number.

It is not a de Polignac number, because 37994405 - 2⁸ = 37994149 is a prime.

It is a super-2 number, since 2×37994405² = 2887149622608050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15611 + ... + 17879.

It is an arithmetic number, because the mean of its divisors is an integer number (3033855).

Almost surely, 2^37994405 is an apocalyptic number.

It is an amenable number.

37994405 is a deficient number, since it is larger than the sum of its proper divisors (10547275).

37994405 is a wasteful number, since it uses less digits than its factorization.

37994405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 37994405 is about 6163.9601718376. The cubic root of 37994405 is about 336.1810396486.

The spelling of 37994405 in words is "thirty-seven million, nine hundred ninety-four thousand, four hundred five".