1405740990 has 16 divisors (see below), whose sum is σ = 3373778448. Its totient is φ = 374864256.

The previous prime is 1405740989. The next prime is 1405740991. The reversal of 1405740990 is 990475041.

It is an interprime number because it is at equal distance from previous prime (1405740989) and next prime (1405740991).

It is a super-3 number, since 3×1405740990³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405740991) 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, 23428987 + ... + 23429046.

It is an arithmetic number, because the mean of its divisors is an integer number (210861153).

Almost surely, 2^1405740990 is an apocalyptic number.

1405740990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1405740990 is an abundant number, since it is smaller than the sum of its proper divisors (1968037458).

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

1405740990 is a wasteful number, since it uses less digits than its factorization.

1405740990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46858043.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1405740990 is about 37493.2125857468. The cubic root of 1405740990 is about 1120.2159952255.

The spelling of 1405740990 in words is "one billion, four hundred five million, seven hundred forty thousand, nine hundred ninety".