69749440 has 112 divisors (see below), whose sum is σ = 175820832. Its totient is φ = 26320896.

The previous prime is 69749423. The next prime is 69749443. The reversal of 69749440 is 4494796.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (69749443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509052 + ... + 509188.

Almost surely, 2^69749440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69749440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87910416).

69749440 is an abundant number, since it is smaller than the sum of its proper divisors (106071392).

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

69749440 is a wasteful number, since it uses less digits than its factorization.

69749440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 69749440 is about 8351.6130178547. The cubic root of 69749440 is about 411.6362138976.

The spelling of 69749440 in words is "sixty-nine million, seven hundred forty-nine thousand, four hundred forty".