400286480 has 80 divisors (see below), whose sum is σ = 1059467904. Its totient is φ = 139223040.

The previous prime is 400286473. The next prime is 400286519. The reversal of 400286480 is 84682004.

Added to its reverse (84682004) it gives a square (484968484 = 22022²).

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10352 + ... + 30128.

Almost surely, 2^400286480 is an apocalyptic number.

400286480 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400286480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529733952).

400286480 is an abundant number, since it is smaller than the sum of its proper divisors (659181424).

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

400286480 is a wasteful number, since it uses less digits than its factorization.

400286480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19824 (or 19818 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 400286480 is about 20007.1607181029. The cubic root of 400286480 is about 736.9821579755.

Adding to 400286480 its reverse (84682004), we get a square (484968484 = 22022²).

The spelling of 400286480 in words is "four hundred million, two hundred eighty-six thousand, four hundred eighty".