919989504 has 324 divisors, whose sum is σ = 3203387460. Its totient is φ = 252887040.

The previous prime is 919989503. The next prime is 919989541. The reversal of 919989504 is 405989919.

919989504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 553190400 + 366799104 = 23520^2 + 19152^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919989503) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3273844 + ... + 3274124.

Almost surely, 2^919989504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 919989504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601693730).

919989504 is an abundant number, since it is smaller than the sum of its proper divisors (2283397956).

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

919989504 is a wasteful number, since it uses less digits than its factorization.

919989504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 919989504 is about 30331.3287542765. The cubic root of 919989504 is about 972.5851275482.

The spelling of 919989504 in words is "nine hundred nineteen million, nine hundred eighty-nine thousand, five hundred four".