40751640 has 128 divisors (see below), whose sum is σ = 137592000. Its totient is φ = 10727424.

The previous prime is 40751621. The next prime is 40751693. The reversal of 40751640 is 4615704.

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, 104566 + ... + 104954.

Almost surely, 2^40751640 is an apocalyptic number.

40751640 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 40751640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68796000).

40751640 is an abundant number, since it is smaller than the sum of its proper divisors (96840360).

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

40751640 is a wasteful number, since it uses less digits than its factorization.

40751640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 496 counting only the distinct ones).

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

The square root of 40751640 is about 6383.7011208232. The cubic root of 40751640 is about 344.1240538700.

The spelling of 40751640 in words is "forty million, seven hundred fifty-one thousand, six hundred forty".