69949440 has 384 divisors, whose sum is σ = 283046400. Its totient is φ = 16220160.

The previous prime is 69949379. The next prime is 69949501. The reversal of 69949440 is 4494996.

It is an interprime number because it is at equal distance from previous prime (69949379) and next prime (69949501).

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3041269 + ... + 3041291.

It is an arithmetic number, because the mean of its divisors is an integer number (737100).

Almost surely, 2^69949440 is an apocalyptic number.

69949440 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 69949440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141523200).

69949440 is an abundant number, since it is smaller than the sum of its proper divisors (213096960).

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

69949440 is a wasteful number, since it uses less digits than its factorization.

69949440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 69949440 is about 8363.5781816158. The cubic root of 69949440 is about 412.0292812318.

The spelling of 69949440 in words is "sixty-nine million, nine hundred forty-nine thousand, four hundred forty".