70445388 has 48 divisors (see below), whose sum is σ = 186341120. Its totient is φ = 20533824.

The previous prime is 70445387. The next prime is 70445393. The reversal of 70445388 is 88354407.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (70445383) 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, 8920 + ... + 14847.

Almost surely, 2^70445388 is an apocalyptic number.

70445388 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

70445388 is an abundant number, since it is smaller than the sum of its proper divisors (115895732).

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

70445388 is a wasteful number, since it uses less digits than its factorization.

70445388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23806 (or 23804 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 70445388 is about 8393.1750845553. The cubic root of 70445388 is about 413.0007641077. Note that the first 3 decimals are identical.

The spelling of 70445388 in words is "seventy million, four hundred forty-five thousand, three hundred eighty-eight".