380400652840 has 64 divisors (see below), whose sum is σ = 924475602960. Its totient is φ = 140038778880.

The previous prime is 380400652811. The next prime is 380400652843. The reversal of 380400652840 is 48256004083.

It can be written as a sum of positive squares in 8 ways, for example, as 5173349476 + 375227303364 = 71926^2 + 612558^2 .

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 = 380400652793 and 380400652802.

It is not an unprimeable number, because it can be changed into a prime (380400652843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 910131 + ... + 1260610.

Almost surely, 2^380400652840 is an apocalyptic number.

It is an amenable number.

380400652840 is an abundant number, since it is smaller than the sum of its proper divisors (544074950120).

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

380400652840 is a wasteful number, since it uses less digits than its factorization.

380400652840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171102 (or 2171098 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 380400652840 in words is "three hundred eighty billion, four hundred million, six hundred fifty-two thousand, eight hundred forty".