919473990 has 32 divisors (see below), whose sum is σ = 2302684416. Its totient is φ = 234532320.

The previous prime is 919473979. The next prime is 919473991. The reversal of 919473990 is 99374919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919473991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 665596 + ... + 666975.

It is an arithmetic number, because the mean of its divisors is an integer number (71958888).

Almost surely, 2^919473990 is an apocalyptic number.

919473990 is an abundant number, since it is smaller than the sum of its proper divisors (1383210426).

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

919473990 is a wasteful number, since it uses less digits than its factorization.

919473990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332604.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 919473990 is about 30322.8295183678. The cubic root of 919473990 is about 972.4034316608.

The spelling of 919473990 in words is "nine hundred nineteen million, four hundred seventy-three thousand, nine hundred ninety".