40069290 has 32 divisors (see below), whose sum is σ = 101229120. Its totient is φ = 10122624.

The previous prime is 40069277. The next prime is 40069297. The reversal of 40069290 is 9296004.

It is a super-2 number, since 2×40069290² = 3211096002208200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40069297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34579 + ... + 35718.

It is an arithmetic number, because the mean of its divisors is an integer number (3163410).

Almost surely, 2^40069290 is an apocalyptic number.

40069290 is an abundant number, since it is smaller than the sum of its proper divisors (61159830).

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

40069290 is a wasteful number, since it uses less digits than its factorization.

40069290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70326.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 40069290 is about 6330.0308056122. The cubic root of 40069290 is about 342.1925491426.

The spelling of 40069290 in words is "forty million, sixty-nine thousand, two hundred ninety".