70640380 has 12 divisors (see below), whose sum is σ = 148344840. Its totient is φ = 28256144.

The previous prime is 70640359. The next prime is 70640399. The reversal of 70640380 is 8304607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1765990 + ... + 1766029.

It is an arithmetic number, because the mean of its divisors is an integer number (12362070).

Almost surely, 2^70640380 is an apocalyptic number.

It is an amenable number.

70640380 is an abundant number, since it is smaller than the sum of its proper divisors (77704460).

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

70640380 is a wasteful number, since it uses less digits than its factorization.

70640380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532028 (or 3532026 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 70640380 is about 8404.7831619858. The cubic root of 70640380 is about 413.3814734657.

Adding to 70640380 its reverse (8304607), we get a palindrome (78944987).

The spelling of 70640380 in words is "seventy million, six hundred forty thousand, three hundred eighty".