400064045 has 8 divisors (see below), whose sum is σ = 491241696. Its totient is φ = 312608016.

The previous prime is 400063969. The next prime is 400064053. The reversal of 400064045 is 540460004.

It is a happy number.

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 400064045 - 2¹⁸ = 399801901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400064045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930167 + ... + 930596.

It is an arithmetic number, because the mean of its divisors is an integer number (61405212).

Almost surely, 2^400064045 is an apocalyptic number.

It is an amenable number.

400064045 is a deficient number, since it is larger than the sum of its proper divisors (91177651).

400064045 is a wasteful number, since it uses less digits than its factorization.

400064045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860811.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400064045 is about 20001.6010609151. The cubic root of 400064045 is about 736.8456215957.

The spelling of 400064045 in words is "four hundred million, sixty-four thousand, forty-five".