1900400131 has 36 divisors (see below), whose sum is σ = 2391598768. Its totient is φ = 1478905344.

The previous prime is 1900400107. The next prime is 1900400141. The reversal of 1900400131 is 1310040091.

It is a happy number.

It is not a de Polignac number, because 1900400131 - 2²³ = 1892011523 is a prime.

It is a super-2 number, since 2×1900400131² = 7223041315809634322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1900400099 and 1900400108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900400141) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1700785 + ... + 1701901.

Almost surely, 2^1900400131 is an apocalyptic number.

1900400131 is a deficient number, since it is larger than the sum of its proper divisors (491198637).

1900400131 is a wasteful number, since it uses less digits than its factorization.

1900400131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1900400131 is about 43593.5790111342. The cubic root of 1900400131 is about 1238.6492686474.

The spelling of 1900400131 in words is "one billion, nine hundred million, four hundred thousand, one hundred thirty-one".