40180402 has 32 divisors (see below), whose sum is σ = 68382720. Its totient is φ = 17606160.

The previous prime is 40180397. The next prime is 40180429. The reversal of 40180402 is 20408104.

It is a super-3 number, since 3×40180402³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 40180402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26353 + ... + 27835.

It is an arithmetic number, because the mean of its divisors is an integer number (2136960).

Almost surely, 2^40180402 is an apocalyptic number.

40180402 is a deficient number, since it is larger than the sum of its proper divisors (28202318).

40180402 is a wasteful number, since it uses less digits than its factorization.

40180402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 40180402 is about 6338.8013062408. The cubic root of 40180402 is about 342.5085568040.

Adding to 40180402 its reverse (20408104), we get a palindrome (60588506).

The spelling of 40180402 in words is "forty million, one hundred eighty thousand, four hundred two".