2147890406 has 4 divisors (see below), whose sum is σ = 3221835612. Its totient is φ = 1073945202.

The previous prime is 2147890357. The next prime is 2147890429. The reversal of 2147890406 is 6040987412.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2147890406² = 9226866392373689672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536972600 + ... + 536972603.

It is an arithmetic number, because the mean of its divisors is an integer number (805458903).

Almost surely, 2^2147890406 is an apocalyptic number.

2147890406 is a deficient number, since it is larger than the sum of its proper divisors (1073945206).

2147890406 is a wasteful number, since it uses less digits than its factorization.

2147890406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073945205.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 2147890406 is about 46345.3385573997. The cubic root of 2147890406 is about 1290.2406069237.

The spelling of 2147890406 in words is "two billion, one hundred forty-seven million, eight hundred ninety thousand, four hundred six".