40670640 has 160 divisors (see below), whose sum is σ = 147609600. Its totient is φ = 10264320.

The previous prime is 40670599. The next prime is 40670657. The reversal of 40670640 is 4607604.

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

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, 40545 + ... + 41535.

It is an arithmetic number, because the mean of its divisors is an integer number (922560).

Almost surely, 2^40670640 is an apocalyptic number.

40670640 is a gapful number since it is divisible by the number (40) 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 40670640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73804800).

40670640 is an abundant number, since it is smaller than the sum of its proper divisors (106938960).

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

40670640 is a wasteful number, since it uses less digits than its factorization.

40670640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 40670640 is about 6377.3536831510. The cubic root of 40670640 is about 343.8959032423.

The spelling of 40670640 in words is "forty million, six hundred seventy thousand, six hundred forty".