1378672949 has 8 divisors (see below), whose sum is σ = 1409384448. Its totient is φ = 1348018960.

The previous prime is 1378672943. The next prime is 1378672957. The reversal of 1378672949 is 9492768731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1378672949 - 2²⁸ = 1110237493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1378672894 and 1378672903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378672943) 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, 36044 + ... + 63690.

It is an arithmetic number, because the mean of its divisors is an integer number (176173056).

Almost surely, 2^1378672949 is an apocalyptic number.

It is an amenable number.

1378672949 is a deficient number, since it is larger than the sum of its proper divisors (30711499).

1378672949 is a wasteful number, since it uses less digits than its factorization.

1378672949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28755.

The product of its digits is 4572288, while the sum is 56.

The square root of 1378672949 is about 37130.4854398646. The cubic root of 1378672949 is about 1112.9792941133.

The spelling of 1378672949 in words is "one billion, three hundred seventy-eight million, six hundred seventy-two thousand, nine hundred forty-nine".