400681470 has 64 divisors (see below), whose sum is σ = 1101288960. Its totient is φ = 91394688.

The previous prime is 400681469. The next prime is 400681513. The reversal of 400681470 is 74186004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116536 + ... + 119924.

It is an arithmetic number, because the mean of its divisors is an integer number (17207640).

Almost surely, 2^400681470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400681470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550644480).

400681470 is an abundant number, since it is smaller than the sum of its proper divisors (700607490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400681470 is a wasteful number, since it uses less digits than its factorization.

400681470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 400681470 is about 20017.0294999033. The cubic root of 400681470 is about 737.2244884896.

The spelling of 400681470 in words is "four hundred million, six hundred eighty-one thousand, four hundred seventy".