1855457972 has 6 divisors (see below), whose sum is σ = 3247051458. Its totient is φ = 927728984.

The previous prime is 1855457957. The next prime is 1855457983. The reversal of 1855457972 is 2797545581.

It can be written as a sum of positive squares in only one way, i.e., 1273490596 + 581967376 = 35686^2 + 24124^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 231932243 + ... + 231932250.

It is an arithmetic number, because the mean of its divisors is an integer number (541175243).

Almost surely, 2^1855457972 is an apocalyptic number.

It is an amenable number.

1855457972 is a deficient number, since it is larger than the sum of its proper divisors (1391593486).

1855457972 is a wasteful number, since it uses less digits than its factorization.

1855457972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463864497 (or 463864495 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 53.

The square root of 1855457972 is about 43075.0272431719. The cubic root of 1855457972 is about 1228.8070863174.

The spelling of 1855457972 in words is "one billion, eight hundred fifty-five million, four hundred fifty-seven thousand, nine hundred seventy-two".