7940890 has 8 divisors (see below), whose sum is σ = 14293620. Its totient is φ = 3176352.

The previous prime is 7940857. The next prime is 7940893. The reversal of 7940890 is 980497.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7667361 + 273529 = 2769^2 + 523^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7940893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397035 + ... + 397054.

Almost surely, 2^7940890 is an apocalyptic number.

7940890 is a deficient number, since it is larger than the sum of its proper divisors (6352730).

7940890 is a wasteful number, since it uses less digits than its factorization.

7940890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794096.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 7940890 is about 2817.9584808865. The cubic root of 7940890 is about 199.5061984703.

The spelling of 7940890 in words is "seven million, nine hundred forty thousand, eight hundred ninety".