40651408 has 40 divisors (see below), whose sum is σ = 91119168. Its totient is φ = 17208192.

The previous prime is 40651361. The next prime is 40651409. The reversal of 40651408 is 80415604.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (40651409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7110 + ... + 11482.

Almost surely, 2^40651408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40651408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45559584).

40651408 is an abundant number, since it is smaller than the sum of its proper divisors (50467760).

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

40651408 is a wasteful number, since it uses less digits than its factorization.

40651408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4471 (or 4465 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40651408 is about 6375.8456693995. The cubic root of 40651408 is about 343.8416884674.

The spelling of 40651408 in words is "forty million, six hundred fifty-one thousand, four hundred eight".