420402002440 has 64 divisors (see below), whose sum is σ = 1081182504960. Its totient is φ = 144117991680.

The previous prime is 420402002437. The next prime is 420402002443. The reversal of 420402002440 is 44200204024.

It is an interprime number because it is at equal distance from previous prime (420402002437) and next prime (420402002443).

It is not an unprimeable number, because it can be changed into a prime (420402002443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2011929 + ... + 2211031.

It is an arithmetic number, because the mean of its divisors is an integer number (16893476640).

Almost surely, 2^420402002440 is an apocalyptic number.

420402002440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420402002440 is an abundant number, since it is smaller than the sum of its proper divisors (660780502520).

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

420402002440 is a wasteful number, since it uses less digits than its factorization.

420402002440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206662 (or 206658 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 420402002440 its reverse (44200204024), we get a palindrome (464602206464).

The spelling of 420402002440 in words is "four hundred twenty billion, four hundred two million, two thousand, four hundred forty".