420400260 has 96 divisors (see below), whose sum is σ = 1494769920. Its totient is φ = 96090624.

The previous prime is 420400249. The next prime is 420400271. The reversal of 420400260 is 62004024.

420400260 is a `hidden beast` number, since 4 + 2 + 0 + 400 + 260 = 666.

It is an interprime number because it is at equal distance from previous prime (420400249) and next prime (420400271).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 51829 + ... + 59388.

It is an arithmetic number, because the mean of its divisors is an integer number (15570520).

Almost surely, 2^420400260 is an apocalyptic number.

It is an amenable number.

420400260 is an abundant number, since it is smaller than the sum of its proper divisors (1074369660).

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

420400260 is a wasteful number, since it uses less digits than its factorization.

420400260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111242 (or 111234 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420400260 is about 20503.6645505139. The cubic root of 420400260 is about 749.1250597029.

Adding to 420400260 its reverse (62004024), we get a palindrome (482404284).

The spelling of 420400260 in words is "four hundred twenty million, four hundred thousand, two hundred sixty".