37640242 has 4 divisors (see below), whose sum is σ = 56460366. Its totient is φ = 18820120.

The previous prime is 37640221. The next prime is 37640249. The reversal of 37640242 is 24204673.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35271721 + 2368521 = 5939^2 + 1539^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 37640242.

It is not an unprimeable number, because it can be changed into a prime (37640249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9410059 + ... + 9410062.

Almost surely, 2^37640242 is an apocalyptic number.

37640242 is a deficient number, since it is larger than the sum of its proper divisors (18820124).

37640242 is a wasteful number, since it uses less digits than its factorization.

37640242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18820123.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 37640242 is about 6135.1643824758. The cubic root of 37640242 is about 335.1332120397.

The spelling of 37640242 in words is "thirty-seven million, six hundred forty thousand, two hundred forty-two".