7918990 has 8 divisors (see below), whose sum is σ = 14254200. Its totient is φ = 3167592.

The previous prime is 7918987. The next prime is 7919003. The reversal of 7918990 is 998197.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395940 + ... + 395959.

It is an arithmetic number, because the mean of its divisors is an integer number (1781775).

Almost surely, 2^7918990 is an apocalyptic number.

7918990 is a deficient number, since it is larger than the sum of its proper divisors (6335210).

7918990 is a wasteful number, since it uses less digits than its factorization.

7918990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791906.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 7918990 is about 2814.0700062365. The cubic root of 7918990 is about 199.3226250727.

It can be divided in two parts, 7918 and 990, that multiplied together give a triangular number (7838820 = T₃₉₅₉).

The spelling of 7918990 in words is "seven million, nine hundred eighteen thousand, nine hundred ninety".