70409328 has 40 divisors (see below), whose sum is σ = 198427776. Its totient is φ = 21336000.

The previous prime is 70409321. The next prime is 70409329. The reversal of 70409328 is 82390407.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70409321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66148 + ... + 67203.

Almost surely, 2^70409328 is an apocalyptic number.

It is an amenable number.

70409328 is an abundant number, since it is smaller than the sum of its proper divisors (128018448).

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

70409328 is a wasteful number, since it uses less digits than its factorization.

70409328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133373 (or 133367 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 70409328 is about 8391.0266356388. The cubic root of 70409328 is about 412.9302823258.

The spelling of 70409328 in words is "seventy million, four hundred nine thousand, three hundred twenty-eight".