1400420412 has 72 divisors (see below), whose sum is σ = 3813089280. Its totient is φ = 432099360.

The previous prime is 1400420383. The next prime is 1400420473. The reversal of 1400420412 is 2140240041.

It is a super-2 number, since 2×1400420412² = 3922354660692499488, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1612 + ... + 52947.

Almost surely, 2^1400420412 is an apocalyptic number.

1400420412 is a gapful number since it is divisible by the number (12) 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 1400420412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1906544640).

1400420412 is an abundant number, since it is smaller than the sum of its proper divisors (2412668868).

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

1400420412 is a wasteful number, since it uses less digits than its factorization.

1400420412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54623 (or 54618 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1400420412 is about 37422.1914377018. The cubic root of 1400420412 is about 1118.8009095067.

Adding to 1400420412 its reverse (2140240041), we get a palindrome (3540660453).

The spelling of 1400420412 in words is "one billion, four hundred million, four hundred twenty thousand, four hundred twelve".