69481840 has 40 divisors (see below), whose sum is σ = 162007488. Its totient is φ = 27713280.

The previous prime is 69481831. The next prime is 69481861. The reversal of 69481840 is 4818496.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 69481793 and 69481802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32649 + ... + 34711.

Almost surely, 2^69481840 is an apocalyptic number.

It is an amenable number.

69481840 is an abundant number, since it is smaller than the sum of its proper divisors (92525648).

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

69481840 is a wasteful number, since it uses less digits than its factorization.

69481840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 69481840 is about 8335.5767646876. The cubic root of 69481840 is about 411.1091127788.

The spelling of 69481840 in words is "sixty-nine million, four hundred eighty-one thousand, eight hundred forty".