70214640 has 40 divisors (see below), whose sum is σ = 217666128. Its totient is φ = 18723840.

The previous prime is 70214629. The next prime is 70214687. The reversal of 70214640 is 4641207.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 70214640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146041 + ... + 146520.

Almost surely, 2^70214640 is an apocalyptic number.

It is an amenable number.

70214640 is an abundant number, since it is smaller than the sum of its proper divisors (147451488).

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

70214640 is a wasteful number, since it uses less digits than its factorization.

70214640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292577 (or 292571 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 70214640 is about 8379.4176408626. The cubic root of 70214640 is about 412.5493347789.

Adding to 70214640 its reverse (4641207), we get a palindrome (74855847).

The spelling of 70214640 in words is "seventy million, two hundred fourteen thousand, six hundred forty".