69723990 has 96 divisors (see below), whose sum is σ = 214905600. Its totient is φ = 15933024.

The previous prime is 69723989. The next prime is 69724009. The reversal of 69723990 is 9932796.

It is a super-2 number, since 2×69723990² = 9722869563040200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14961 + ... + 19059.

It is an arithmetic number, because the mean of its divisors is an integer number (2238600).

Almost surely, 2^69723990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69723990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107452800).

69723990 is an abundant number, since it is smaller than the sum of its proper divisors (145181610).

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

69723990 is a wasteful number, since it uses less digits than its factorization.

69723990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128 (or 4116 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 69723990 is about 8350.0892210802. The cubic root of 69723990 is about 411.5861422121.

The spelling of 69723990 in words is "sixty-nine million, seven hundred twenty-three thousand, nine hundred ninety".