2353971640 has 32 divisors (see below), whose sum is σ = 5607992880. Its totient is φ = 886200832.

The previous prime is 2353971637. The next prime is 2353971647. The reversal of 2353971640 is 461793532.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2353971593 and 2353971602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2353971647) 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, 1730182 + ... + 1731541.

Almost surely, 2^2353971640 is an apocalyptic number.

2353971640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2353971640 is an abundant number, since it is smaller than the sum of its proper divisors (3254021240).

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

2353971640 is a wasteful number, since it uses less digits than its factorization.

2353971640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461751 (or 3461747 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 2353971640 is about 48517.7456195153. The cubic root of 2353971640 is about 1330.2514533893.

The spelling of 2353971640 in words is "two billion, three hundred fifty-three million, nine hundred seventy-one thousand, six hundred forty".