36978621 has 8 divisors (see below), whose sum is σ = 52205184. Its totient is φ = 23202240.

The previous prime is 36978619. The next prime is 36978647. The reversal of 36978621 is 12687963.

36978621 = 2023² + 2024² + ... + 2031².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36978621 - 2¹ = 36978619 is a prime.

It is a super-2 number, since 2×36978621² = 2734836822123282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36978121) 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, 362485 + ... + 362586.

It is an arithmetic number, because the mean of its divisors is an integer number (6525648).

Almost surely, 2^36978621 is an apocalyptic number.

It is an amenable number.

36978621 is a deficient number, since it is larger than the sum of its proper divisors (15226563).

36978621 is a wasteful number, since it uses less digits than its factorization.

36978621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725091.

The product of its digits is 108864, while the sum is 42.

The square root of 36978621 is about 6081.0049333971. The cubic root of 36978621 is about 333.1579930057.

The spelling of 36978621 in words is "thirty-six million, nine hundred seventy-eight thousand, six hundred twenty-one".