69920040 has 64 divisors (see below), whose sum is σ = 210916800. Its totient is φ = 18542592.

The previous prime is 69920033. The next prime is 69920041. The reversal of 69920040 is 4002996.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (69920041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21651 + ... + 24669.

It is an arithmetic number, because the mean of its divisors is an integer number (3295575).

Almost surely, 2^69920040 is an apocalyptic number.

69920040 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 69920040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105458400).

69920040 is an abundant number, since it is smaller than the sum of its proper divisors (140996760).

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

69920040 is a wasteful number, since it uses less digits than its factorization.

69920040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226 (or 3222 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 69920040 is about 8361.8203759708. The cubic root of 69920040 is about 411.9715473486.

The spelling of 69920040 in words is "sixty-nine million, nine hundred twenty thousand, forty".