69921340 has 24 divisors (see below), whose sum is σ = 155472912. Its totient is φ = 26323200.

The previous prime is 69921329. The next prime is 69921343. The reversal of 69921340 is 4312996.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 69921296 and 69921305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69921343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102486 + ... + 103165.

It is an arithmetic number, because the mean of its divisors is an integer number (6478038).

Almost surely, 2^69921340 is an apocalyptic number.

It is an amenable number.

69921340 is an abundant number, since it is smaller than the sum of its proper divisors (85551572).

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

69921340 is a wasteful number, since it uses less digits than its factorization.

69921340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205677 (or 205675 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 69921340 is about 8361.8981098791. The cubic root of 69921340 is about 411.9741005493.

The spelling of 69921340 in words is "sixty-nine million, nine hundred twenty-one thousand, three hundred forty".