1377886464 has 90 divisors (see below), whose sum is σ = 4108669950. Its totient is φ = 459288576.

The previous prime is 1377886463. The next prime is 1377886487. The reversal of 1377886464 is 4646887731.

1377886464 is a `hidden beast` number, since 1 + 37 + 78 + 86 + 464 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1369592064 + 8294400 = 37008^2 + 2880^2 .

It is a super-2 number, since 2×1377886464² = 3797142215348846592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1377886464.

It is not an unprimeable number, because it can be changed into a prime (1377886463) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12489 + ... + 53960.

Almost surely, 2^1377886464 is an apocalyptic number.

It is an amenable number.

1377886464 is an abundant number, since it is smaller than the sum of its proper divisors (2730783486).

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

1377886464 is an frugal number, since it uses more digits than its factorization.

1377886464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66477 (or 66454 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The square root of 1377886464 is about 37119.8931032944. The cubic root of 1377886464 is about 1112.7676151883.

The spelling of 1377886464 in words is "one billion, three hundred seventy-seven million, eight hundred eighty-six thousand, four hundred sixty-four".