69090840 has 512 divisors, whose sum is σ = 306432000. Its totient is φ = 13436928.

The previous prime is 69090787. The next prime is 69090851. The reversal of 69090840 is 4809096.

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

It is a junction number, because it is equal to n+sod(n) for n = 69090795 and 69090804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1867302 + ... + 1867338.

It is an arithmetic number, because the mean of its divisors is an integer number (598500).

Almost surely, 2^69090840 is an apocalyptic number.

69090840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69090840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153216000).

69090840 is an abundant number, since it is smaller than the sum of its proper divisors (237341160).

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

69090840 is a wasteful number, since it uses less digits than its factorization.

69090840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 69090840 is about 8312.0899898882. The cubic root of 69090840 is about 410.3365073966.

The spelling of 69090840 in words is "sixty-nine million, ninety thousand, eight hundred forty".