477221440 has 112 divisors (see below), whose sum is σ = 1190914560. Its totient is φ = 181923840.

The previous prime is 477221431. The next prime is 477221489. The reversal of 477221440 is 44122774.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 723831 + ... + 724489.

Almost surely, 2^477221440 is an apocalyptic number.

477221440 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 477221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595457280).

477221440 is an abundant number, since it is smaller than the sum of its proper divisors (713693120).

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

477221440 is a wasteful number, since it uses less digits than its factorization.

477221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 477221440 is about 21845.3986001629. The cubic root of 477221440 is about 781.4598127462.

The spelling of 477221440 in words is "four hundred seventy-seven million, two hundred twenty-one thousand, four hundred forty".