400894261 has 4 divisors (see below), whose sum is σ = 404572300. Its totient is φ = 397216224.

The previous prime is 400894259. The next prime is 400894267. The reversal of 400894261 is 162498004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259403236 + 141491025 = 16106^2 + 11895^2 .

It is a cyclic number.

It is not a de Polignac number, because 400894261 - 2¹ = 400894259 is a prime.

It is a super-2 number, since 2×400894261² = 321432417005472242, 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 (400894267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1838856 + ... + 1839073.

It is an arithmetic number, because the mean of its divisors is an integer number (101143075).

Almost surely, 2^400894261 is an apocalyptic number.

It is an amenable number.

400894261 is a deficient number, since it is larger than the sum of its proper divisors (3678039).

400894261 is a wasteful number, since it uses less digits than its factorization.

400894261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678038.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 400894261 is about 20022.3440435929. The cubic root of 400894261 is about 737.3549719995.

The spelling of 400894261 in words is "four hundred million, eight hundred ninety-four thousand, two hundred sixty-one".