420340440400 has 60 divisors (see below), whose sum is σ = 1009946144032. Its totient is φ = 168123150720.

The previous prime is 420340440371. The next prime is 420340440413. The reversal of 420340440400 is 4044043024.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6402139 + ... + 6467461.

Almost surely, 2^420340440400 is an apocalyptic number.

420340440400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420340440400 is an abundant number, since it is smaller than the sum of its proper divisors (589605703632).

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

420340440400 is a wasteful number, since it uses less digits than its factorization.

420340440400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81428 (or 81417 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 420340440400 its reverse (4044043024), we get a palindrome (424384483424).

The spelling of 420340440400 in words is "four hundred twenty billion, three hundred forty million, four hundred forty thousand, four hundred".