69640242 has 16 divisors (see below), whose sum is σ = 159177792. Its totient is φ = 19897200.

The previous prime is 69640231. The next prime is 69640243. The reversal of 69640242 is 24204696.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (69640243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829009 + ... + 829092.

It is an arithmetic number, because the mean of its divisors is an integer number (9948612).

Almost surely, 2^69640242 is an apocalyptic number.

69640242 is an abundant number, since it is smaller than the sum of its proper divisors (89537550).

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

69640242 is a wasteful number, since it uses less digits than its factorization.

69640242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658113.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 69640242 is about 8345.0729175963. The cubic root of 69640242 is about 411.4212858677.

The spelling of 69640242 in words is "sixty-nine million, six hundred forty thousand, two hundred forty-two".