742706378 has 4 divisors (see below), whose sum is σ = 1114059570. Its totient is φ = 371353188.

The previous prime is 742706369. The next prime is 742706381. The reversal of 742706378 is 873607247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 617870449 + 124835929 = 24857^2 + 11173^2 .

It is a super-2 number, since 2×742706378² = 1103225527843757768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185676593 + ... + 185676596.

Almost surely, 2^742706378 is an apocalyptic number.

742706378 is a deficient number, since it is larger than the sum of its proper divisors (371353192).

742706378 is a wasteful number, since it uses less digits than its factorization.

742706378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371353191.

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 742706378 is about 27252.6398354361. The cubic root of 742706378 is about 905.6054993759.

The spelling of 742706378 in words is "seven hundred forty-two million, seven hundred six thousand, three hundred seventy-eight".