40142790 has 40 divisors (see below), whose sum is σ = 107941680. Its totient is φ = 10704528.

The previous prime is 40142789. The next prime is 40142803. The reversal of 40142790 is 9724104.

It is a happy number.

It is a super-2 number, since 2×40142790² = 3222887177968200, which contains 22 as substring.

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 19 ways as a sum of consecutive naturals, for example, 23970 + ... + 25589.

It is an arithmetic number, because the mean of its divisors is an integer number (2698542).

Almost surely, 2^40142790 is an apocalyptic number.

40142790 is an abundant number, since it is smaller than the sum of its proper divisors (67798890).

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

40142790 is a wasteful number, since it uses less digits than its factorization.

40142790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49578 (or 49569 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 40142790 is about 6335.8338046385. The cubic root of 40142790 is about 342.4016518375.

Adding to 40142790 its reverse (9724104), we get a palindrome (49866894).

The spelling of 40142790 in words is "forty million, one hundred forty-two thousand, seven hundred ninety".