1523401940 has 24 divisors (see below), whose sum is σ = 3203401992. Its totient is φ = 608549760.

The previous prime is 1523401939. The next prime is 1523401993. The reversal of 1523401940 is 491043251.

It can be written as a sum of positive squares in 4 ways, for example, as 531025936 + 992376004 = 23044^2 + 31502^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35171 + ... + 65450.

It is an arithmetic number, because the mean of its divisors is an integer number (133475083).

Almost surely, 2^1523401940 is an apocalyptic number.

1523401940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1523401940 is an abundant number, since it is smaller than the sum of its proper divisors (1680000052).

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

1523401940 is a wasteful number, since it uses less digits than its factorization.

1523401940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101387 (or 101385 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1523401940 is about 39030.7819547598. The cubic root of 1523401940 is about 1150.6365574753.

The spelling of 1523401940 in words is "one billion, five hundred twenty-three million, four hundred one thousand, nine hundred forty".