1381658026 has 16 divisors (see below), whose sum is σ = 2423640384. Its totient is φ = 578368224.

The previous prime is 1381657969. The next prime is 1381658027. The reversal of 1381658026 is 6208561831.

It is a self number, because there is not a number n which added to its sum of digits gives 1381658026.

It is not an unprimeable number, because it can be changed into a prime (1381658027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1146955 + ... + 1148158.

It is an arithmetic number, because the mean of its divisors is an integer number (151477524).

Almost surely, 2^1381658026 is an apocalyptic number.

1381658026 is a deficient number, since it is larger than the sum of its proper divisors (1041982358).

1381658026 is a wasteful number, since it uses less digits than its factorization.

1381658026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295165.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1381658026 is about 37170.6608227511. The cubic root of 1381658026 is about 1113.7819824183.

The spelling of 1381658026 in words is "one billion, three hundred eighty-one million, six hundred fifty-eight thousand, twenty-six".