40351780 has 24 divisors (see below), whose sum is σ = 96844608. Its totient is φ = 13834848.

The previous prime is 40351777. The next prime is 40351781. The reversal of 40351780 is 8715304.

It is a super-2 number, since 2×40351780² = 3256532298336800, which contains 22 as substring.

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 (40351781) 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, 143974 + ... + 144253.

It is an arithmetic number, because the mean of its divisors is an integer number (4035192).

Almost surely, 2^40351780 is an apocalyptic number.

It is an amenable number.

40351780 is an abundant number, since it is smaller than the sum of its proper divisors (56492828).

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

40351780 is a wasteful number, since it uses less digits than its factorization.

40351780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288243 (or 288241 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 40351780 is about 6352.3050934287. The cubic root of 40351780 is about 342.9948235073.

The spelling of 40351780 in words is "forty million, three hundred fifty-one thousand, seven hundred eighty".