1778120146 has 8 divisors (see below), whose sum is σ = 2909651184. Its totient is φ = 808236420.

The previous prime is 1778120143. The next prime is 1778120147. The reversal of 1778120146 is 6410218771.

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

It is a super-2 number, since 2×1778120146² = 6323422507222122632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1778120143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40411800 + ... + 40411843.

It is an arithmetic number, because the mean of its divisors is an integer number (363706398).

Almost surely, 2^1778120146 is an apocalyptic number.

1778120146 is a deficient number, since it is larger than the sum of its proper divisors (1131531038).

1778120146 is a wasteful number, since it uses less digits than its factorization.

1778120146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80823656.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1778120146 is about 42167.7619278045. The cubic root of 1778120146 is about 1211.4914891066.

The spelling of 1778120146 in words is "one billion, seven hundred seventy-eight million, one hundred twenty thousand, one hundred forty-six".