70387500 has 72 divisors (see below), whose sum is σ = 205393104. Its totient is φ = 18760000.

The previous prime is 70387469. The next prime is 70387507. The reversal of 70387500 is 578307.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (70387507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36562 + ... + 38438.

It is an arithmetic number, because the mean of its divisors is an integer number (2852682).

Almost surely, 2^70387500 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 70387500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102696552).

70387500 is an abundant number, since it is smaller than the sum of its proper divisors (135005604).

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

70387500 is a wasteful number, since it uses less digits than its factorization.

70387500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 70387500 is about 8389.7258596452. The cubic root of 70387500 is about 412.8876062863.

The spelling of 70387500 in words is "seventy million, three hundred eighty-seven thousand, five hundred".