7399990 has 16 divisors (see below), whose sum is σ = 14344848. Its totient is φ = 2732256.

The previous prime is 7399961. The next prime is 7399993. The reversal of 7399990 is 999937.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7399990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7399993) 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, 28332 + ... + 28591.

It is an arithmetic number, because the mean of its divisors is an integer number (896553).

Almost surely, 2^7399990 is an apocalyptic number.

7399990 is a deficient number, since it is larger than the sum of its proper divisors (6944858).

7399990 is a wasteful number, since it uses less digits than its factorization.

7399990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56943.

The product of its (nonzero) digits is 137781, while the sum is 46.

The square root of 7399990 is about 2720.2922637099. The cubic root of 7399990 is about 194.8694282584.

The spelling of 7399990 in words is "seven million, three hundred ninety-nine thousand, nine hundred ninety".