3972090 has 16 divisors (see below), whose sum is σ = 9533088. Its totient is φ = 1059216.

The previous prime is 3972071. The next prime is 3972091. The reversal of 3972090 is 902793.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 132403 = 3972090 / (3 + 9 + 7 + 2 + 0 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (3972091) 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, 66172 + ... + 66231.

It is an arithmetic number, because the mean of its divisors is an integer number (595818).

Almost surely, 2^3972090 is an apocalyptic number.

3972090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3972090 is an abundant number, since it is smaller than the sum of its proper divisors (5560998).

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

3972090 is a wasteful number, since it uses less digits than its factorization.

3972090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132413.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 3972090 is about 1993.0102859745. The cubic root of 3972090 is about 158.3700401199.

The spelling of 3972090 in words is "three million, nine hundred seventy-two thousand, ninety".