400120919 has 8 divisors (see below), whose sum is σ = 437246208. Its totient is φ = 363120760.

The previous prime is 400120901. The next prime is 400120933. The reversal of 400120919 is 919021004.

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 400120919 - 2¹² = 400116823 is a prime.

It is a super-2 number, since 2×400120919² = 320193499642809122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400120939) 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, 24527 + ... + 37440.

It is an arithmetic number, because the mean of its divisors is an integer number (54655776).

Almost surely, 2^400120919 is an apocalyptic number.

400120919 is a deficient number, since it is larger than the sum of its proper divisors (37125289).

400120919 is a wasteful number, since it uses less digits than its factorization.

400120919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62565.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 400120919 is about 20003.0227465751. The cubic root of 400120919 is about 736.8805371488.

The spelling of 400120919 in words is "four hundred million, one hundred twenty thousand, nine hundred nineteen".