70697640 has 64 divisors (see below), whose sum is σ = 228412800. Its totient is φ = 17402112.

The previous prime is 70697629. The next prime is 70697647. The reversal of 70697640 is 4679607.

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 (70697647) 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 15 ways as a sum of consecutive naturals, for example, 21100 + ... + 24219.

It is an arithmetic number, because the mean of its divisors is an integer number (3568950).

Almost surely, 2^70697640 is an apocalyptic number.

It is an amenable number.

70697640 is an abundant number, since it is smaller than the sum of its proper divisors (157715160).

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

70697640 is a wasteful number, since it uses less digits than its factorization.

70697640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45346 (or 45342 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 70697640 is about 8408.1888656238. The cubic root of 70697640 is about 413.4931368443.

It can be divided in two parts, 706 and 97640, that added together give a triangular number (98346 = T₄₄₃).

The spelling of 70697640 in words is "seventy million, six hundred ninety-seven thousand, six hundred forty".