1385861492 has 24 divisors (see below), whose sum is σ = 2524945416. Its totient is φ = 664962048.

The previous prime is 1385861473. The next prime is 1385861507. The reversal of 1385861492 is 2941685831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 152868496 + 1232992996 = 12364^2 + 35114^2 .

It is a super-2 number, since 2×1385861492² = 3841224150016932128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53333 + ... + 74940.

It is an arithmetic number, because the mean of its divisors is an integer number (105206059).

Almost surely, 2^1385861492 is an apocalyptic number.

It is an amenable number.

1385861492 is a deficient number, since it is larger than the sum of its proper divisors (1139083924).

1385861492 is a wasteful number, since it uses less digits than its factorization.

1385861492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128387 (or 128385 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 1385861492 is about 37227.1606760440. The cubic root of 1385861492 is about 1114.9103380615.

The spelling of 1385861492 in words is "one billion, three hundred eighty-five million, eight hundred sixty-one thousand, four hundred ninety-two".