1377657390 has 64 divisors (see below), whose sum is σ = 3520661760. Its totient is φ = 343810560.

The previous prime is 1377657389. The next prime is 1377657397. The reversal of 1377657390 is 937567731.

It is a super-2 number, since 2×1377657390² = 3795879768443224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377657397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83745 + ... + 98835.

It is an arithmetic number, because the mean of its divisors is an integer number (55010340).

Almost surely, 2^1377657390 is an apocalyptic number.

1377657390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1377657390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1760330880).

1377657390 is an abundant number, since it is smaller than the sum of its proper divisors (2143004370).

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

1377657390 is a wasteful number, since it uses less digits than its factorization.

1377657390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15297.

The product of its (nonzero) digits is 833490, while the sum is 48.

The square root of 1377657390 is about 37116.8073788681. The cubic root of 1377657390 is about 1112.7059457976.

The spelling of 1377657390 in words is "one billion, three hundred seventy-seven million, six hundred fifty-seven thousand, three hundred ninety".