69899920 has 80 divisors (see below), whose sum is σ = 174096000. Its totient is φ = 26007552.

The previous prime is 69899899. The next prime is 69899927. The reversal of 69899920 is 2999896.

69899920 = T₂₁₀ + T₂₁₁ + ... + T₇₅₃.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69899927) 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, 139831 + ... + 140329.

It is an arithmetic number, because the mean of its divisors is an integer number (2176200).

Almost surely, 2^69899920 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 69899920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87048000).

69899920 is an abundant number, since it is smaller than the sum of its proper divisors (104196080).

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

69899920 is a wasteful number, since it uses less digits than its factorization.

69899920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 69899920 is about 8360.6172020970. The cubic root of 69899920 is about 411.9320276214.

The spelling of 69899920 in words is "sixty-nine million, eight hundred ninety-nine thousand, nine hundred twenty".