70451640 has 128 divisors (see below), whose sum is σ = 268416000. Its totient is φ = 16101504.

The previous prime is 70451629. The next prime is 70451657. The reversal of 70451640 is 4615407.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2901 + ... + 12219.

It is an arithmetic number, because the mean of its divisors is an integer number (2097000).

Almost surely, 2^70451640 is an apocalyptic number.

70451640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70451640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134208000).

70451640 is an abundant number, since it is smaller than the sum of its proper divisors (197964360).

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

70451640 is a wasteful number, since it uses less digits than its factorization.

70451640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9346 (or 9336 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 70451640 is about 8393.5475217574. The cubic root of 70451640 is about 413.0129816305.

The spelling of 70451640 in words is "seventy million, four hundred fifty-one thousand, six hundred forty".