1387612446 has 128 divisors (see below), whose sum is σ = 3305111040. Its totient is φ = 383846400.

The previous prime is 1387612423. The next prime is 1387612469. The reversal of 1387612446 is 6442167831.

It is an interprime number because it is at equal distance from previous prime (1387612423) and next prime (1387612469).

It is a super-3 number, since 3×1387612446³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1387612398 and 1387612407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7043620 + ... + 7043816.

It is an arithmetic number, because the mean of its divisors is an integer number (25821180).

Almost surely, 2^1387612446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387612446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652555520).

1387612446 is an abundant number, since it is smaller than the sum of its proper divisors (1917498594).

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

1387612446 is a wasteful number, since it uses less digits than its factorization.

1387612446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410.

The product of its digits is 193536, while the sum is 42.

The square root of 1387612446 is about 37250.6704100745. The cubic root of 1387612446 is about 1115.3796815370.

The spelling of 1387612446 in words is "one billion, three hundred eighty-seven million, six hundred twelve thousand, four hundred forty-six".