1401938090 has 128 divisors (see below), whose sum is σ = 3121348608. Its totient is φ = 443013120.

The previous prime is 1401938081. The next prime is 1401938119. The reversal of 1401938090 is 908391041.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1401938090.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7339895 + ... + 7340085.

It is an arithmetic number, because the mean of its divisors is an integer number (24385536).

Almost surely, 2^1401938090 is an apocalyptic number.

1401938090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1401938090 is an abundant number, since it is smaller than the sum of its proper divisors (1719410518).

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

1401938090 is a wasteful number, since it uses less digits than its factorization.

1401938090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1401938090 is about 37442.4637276983. The cubic root of 1401938090 is about 1119.2049230675.

The spelling of 1401938090 in words is "one billion, four hundred one million, nine hundred thirty-eight thousand, ninety".