400727745 has 48 divisors (see below), whose sum is σ = 760249152. Its totient is φ = 193649280.

The previous prime is 400727699. The next prime is 400727749. The reversal of 400727745 is 547727004.

It is a happy number.

It is not a de Polignac number, because 400727745 - 2⁶ = 400727681 is a prime.

It is a super-2 number, since 2×400727745² = 321165451225570050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400727749) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170599 + ... + 172931.

It is an arithmetic number, because the mean of its divisors is an integer number (15838524).

Almost surely, 2^400727745 is an apocalyptic number.

400727745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400727745 is a deficient number, since it is larger than the sum of its proper divisors (359521407).

400727745 is a wasteful number, since it uses less digits than its factorization.

400727745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2699 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 400727745 is about 20018.1853573195. The cubic root of 400727745 is about 737.2528682646.

The spelling of 400727745 in words is "four hundred million, seven hundred twenty-seven thousand, seven hundred forty-five".