1292479938 has 24 divisors (see below), whose sum is σ = 2819173500. Its totient is φ = 427934304.

The previous prime is 1292479933. The next prime is 1292479943. The reversal of 1292479938 is 8399742921.

It is an interprime number because it is at equal distance from previous prime (1292479933) and next prime (1292479943).

It can be written as a sum of positive squares in 2 ways, for example, as 1173953169 + 118526769 = 34263^2 + 10887^2 .

It is not an unprimeable number, because it can be changed into a prime (1292479933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238273 + ... + 243636.

Almost surely, 2^1292479938 is an apocalyptic number.

1292479938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1292479938 is an abundant number, since it is smaller than the sum of its proper divisors (1526693562).

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

1292479938 is a wasteful number, since it uses less digits than its factorization.

1292479938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482066 (or 482063 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1292479938 is about 35951.0770075112. The cubic root of 1292479938 is about 1089.2843654272.

The spelling of 1292479938 in words is "one billion, two hundred ninety-two million, four hundred seventy-nine thousand, nine hundred thirty-eight".