400619009 has 16 divisors (see below), whose sum is σ = 482697600. Its totient is φ = 324808704.

The previous prime is 400618973. The next prime is 400619069. The reversal of 400619009 is 900916004.

It is a cyclic number.

It is not a de Polignac number, because 400619009 - 2¹² = 400614913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400619069) 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, 100319 + ... + 104235.

It is an arithmetic number, because the mean of its divisors is an integer number (30168600).

Almost surely, 2^400619009 is an apocalyptic number.

It is an amenable number.

400619009 is a deficient number, since it is larger than the sum of its proper divisors (82078591).

400619009 is a wasteful number, since it uses less digits than its factorization.

400619009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 400619009 is about 20015.4692425634. The cubic root of 400619009 is about 737.1861786140.

The spelling of 400619009 in words is "four hundred million, six hundred nineteen thousand, nine".