2190421968 has 80 divisors (see below), whose sum is σ = 6689988480. Its totient is φ = 604251648.

The previous prime is 2190421957. The next prime is 2190422009. The reversal of 2190421968 is 8691240912.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102655 + ... + 122142.

It is an arithmetic number, because the mean of its divisors is an integer number (83624856).

Almost surely, 2^2190421968 is an apocalyptic number.

2190421968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2190421968 is an abundant number, since it is smaller than the sum of its proper divisors (4499566512).

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

2190421968 is a wasteful number, since it uses less digits than its factorization.

2190421968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224844 (or 224838 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 2190421968 is about 46801.9440621861. The cubic root of 2190421968 is about 1298.7012607433.

The spelling of 2190421968 in words is "two billion, one hundred ninety million, four hundred twenty-one thousand, nine hundred sixty-eight".