69681940 has 12 divisors (see below), whose sum is σ = 146332116. Its totient is φ = 27872768.

The previous prime is 69681917. The next prime is 69681967. The reversal of 69681940 is 4918696.

It can be written as a sum of positive squares in 2 ways, for example, as 17322244 + 52359696 = 4162^2 + 7236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742029 + ... + 1742068.

It is an arithmetic number, because the mean of its divisors is an integer number (12194343).

Almost surely, 2^69681940 is an apocalyptic number.

It is an amenable number.

69681940 is an abundant number, since it is smaller than the sum of its proper divisors (76650176).

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

69681940 is a wasteful number, since it uses less digits than its factorization.

69681940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484106 (or 3484104 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 69681940 is about 8347.5709041613. The cubic root of 69681940 is about 411.5033840982.

The spelling of 69681940 in words is "sixty-nine million, six hundred eighty-one thousand, nine hundred forty".