400022609 has 8 divisors (see below), whose sum is σ = 468319488. Its totient is φ = 334513440.

The previous prime is 400022587. The next prime is 400022621. The reversal of 400022609 is 906220004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400022609 - 2²⁰ = 398974033 is a prime.

It is a super-2 number, since 2×400022609² = 320036175422333762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400022659) 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, 696617 + ... + 697190.

It is an arithmetic number, because the mean of its divisors is an integer number (58539936).

Almost surely, 2^400022609 is an apocalyptic number.

It is an amenable number.

400022609 is a deficient number, since it is larger than the sum of its proper divisors (68296879).

400022609 is a wasteful number, since it uses less digits than its factorization.

400022609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393855.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 400022609 is about 20000.5652170132. The cubic root of 400022609 is about 736.8201815112.

The spelling of 400022609 in words is "four hundred million, twenty-two thousand, six hundred nine".