3690978 has 16 divisors (see below), whose sum is σ = 7770720. Its totient is φ = 1165536.

The previous prime is 3690977. The next prime is 3690983. The reversal of 3690978 is 8790963.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3690977) 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, 16075 + ... + 16302.

It is an arithmetic number, because the mean of its divisors is an integer number (485670).

Almost surely, 2^3690978 is an apocalyptic number.

3690978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3690978 is an abundant number, since it is smaller than the sum of its proper divisors (4079742).

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

3690978 is a wasteful number, since it uses less digits than its factorization.

3690978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32401.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3690978 is about 1921.1918175966. The cubic root of 3690978 is about 154.5422219938.

The spelling of 3690978 in words is "three million, six hundred ninety thousand, nine hundred seventy-eight".