69990012 has 72 divisors (see below), whose sum is σ = 186260256. Its totient is φ = 22116864.

The previous prime is 69989923. The next prime is 69990029. The reversal of 69990012 is 21009996.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113128 + ... + 113744.

It is an arithmetic number, because the mean of its divisors is an integer number (2586948).

Almost surely, 2^69990012 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 69990012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93130128).

69990012 is an abundant number, since it is smaller than the sum of its proper divisors (116270244).

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

69990012 is a wasteful number, since it uses less digits than its factorization.

69990012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 69990012 is about 8366.0033468796. The cubic root of 69990012 is about 412.1089274306.

The spelling of 69990012 in words is "sixty-nine million, nine hundred ninety thousand, twelve".