420756400 has 120 divisors (see below), whose sum is σ = 1046183040. Its totient is φ = 162539520.

The previous prime is 420756367. The next prime is 420756403. The reversal of 420756400 is 4657024.

It is not an unprimeable number, because it can be changed into a prime (420756403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1886689 + ... + 1886911.

It is an arithmetic number, because the mean of its divisors is an integer number (8718192).

Almost surely, 2^420756400 is an apocalyptic number.

420756400 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 420756400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523091520).

420756400 is an abundant number, since it is smaller than the sum of its proper divisors (625426640).

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

420756400 is a wasteful number, since it uses less digits than its factorization.

420756400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 420756400 is about 20512.3475009566. The cubic root of 420756400 is about 749.3365391920.

The spelling of 420756400 in words is "four hundred twenty million, seven hundred fifty-six thousand, four hundred".