1421670440 has 32 divisors (see below), whose sum is σ = 3367116000. Its totient is φ = 538737984.

The previous prime is 1421670409. The next prime is 1421670443. The reversal of 1421670440 is 440761241.

It is a happy number.

It is a super-2 number, since 2×1421670440² = 4042293679939587200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421670443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934550 + ... + 936069.

It is an arithmetic number, because the mean of its divisors is an integer number (105222375).

Almost surely, 2^1421670440 is an apocalyptic number.

1421670440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421670440 is an abundant number, since it is smaller than the sum of its proper divisors (1945445560).

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

1421670440 is a wasteful number, since it uses less digits than its factorization.

1421670440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870649 (or 1870645 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 1421670440 is about 37705.0452857439. The cubic root of 1421670440 is about 1124.4314335223.

The spelling of 1421670440 in words is "one billion, four hundred twenty-one million, six hundred seventy thousand, four hundred forty".